class Expter {
  test() {
    console.log("我是class类");
  }
}


let aaa = new Expter;
aaa.test()

let Example=class Exam {
  constructor(a) {
      this.a = a;
      console.log(a);
  }
}

console.log(Example.name);
console.log(Example.constructor(999));
